Permutation-lock



A. B. FIDROCKI. PERMUTATION LOCK. APPLICATION FILED DEC.I6, I919- Patented May 11,

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ANTONI B. FIDROCKI, 'OF LYNN, MASSACHUSETTS.

PERMUTATION-LOCK.

Specification of Letters Patent.

Patented May 11, 1920.

Application filed December 16, 1919. Serial No. 345,389.

To all whom it may concern:

Be it known that I, ANTONI B. FIDROGKI, a citizen of Poland, residing at Lynn, in the county of Essex and State of Massachusetts, have invented certain new and useful Inr provements in Permutation-Locks, of which the following is a specification.

The primary object of the present inven' tion resides in the provision of a lock of the permutation type wherein a plurality of rotating tumblers cooperate with a sliding bolt provided with a plurality ofprojections to hold said bolt and the arm carried thereby immovable relative to a lock shackle.

lVith the above and other objects in view 'that will appear as the nature of the invention is better understood, the same consists in the novel construction, combination and arrangement of parts to be hereinafter more fully described and then claimed.

In the accompanying drawing forming a part of the application and wherein like characters designate corresponding parts throughout the several views;

Figure 1 is a side elevational view of a permutation lock constructed in accordance with the present invention.

Fig. 2 is a longitudinal sectional view taken through the rotating tumblers and adj acent lock frames. I

Fig. 3 is a vertical sectional view taken through the lock.

Fig. 4: is a perspective view of the lock bolt and arm carried thereby removed from the lock structure.

Fig. 5 is a fragmentary view with a portion of the tumbler supporting disks shown in section, and

Fig. 6 is a side elevational View of one of the tumblers removed from the lock structure.

Referring more in detail to the accompanying drawing, and particularly to Figs. 1, 2, and 5, there is illustrated a permutation lock embodying a hook shaped shackle 6 adapted to have the arm 7 held immovable with respect thereto to control the entrance opening to the shackle 6.

The shackle 6 is carried by the circular block 8 that has a tubular screw 9projected from the inner face thereof, said tubular screw having a longitudinal slot 10 extending from one end thereof to the other end. A plurality of disks 11 are threaded on the tubular screw 9 and are ofthc form best illustrated in Figs. 2 and each disk ha ring and arm 7 and to cause an inclined wall 11 defining relatively long engaging faces 12 and relatively short enaging faces 13 between adjacent pairs of disks 11, the disks threaded upon the tubular screw providing a plurality of adjacent V-shaped recesses while the disks 11 when so arranged are slotted as at l lto provide openings registering with the slot 10. When the disks are screwed home upon the screw 9., the same remain permanently positioned relative to the screw slot.

A slide bolt is associated with the slotted screw 9 and disks 11, and is more clearly shown in Fig. 41 as embodying a bolt 15 projecting inwardly from the lower end 16 of the shackle arm 7. The bolt 15 is circular in cross section and is adapted for sliding reception in the bore of the tubular screw 9, the bolt 15 being provided with a plurality of adjacently positioned V-shaped projections 17 extending through the screw slot 10 and the cut-away portions of the disks 11, with the bases of the intervening recesses alined with the relatively narrow contacting faces 13 of the disks 11. The outer end of the arm 7 is provided with a block projection 18 adapted to enter the opening 19 in the shackle 6 to prevent relatively lateral movement of the shackle 6 the parts to correctly aline when in locked engagement.

In order to maintain the parts assembled and locked together, there is provided a plurality of rotating tumblers, each comprisinwardly directed V-shaped projection 21 riding upon adjacent faces 11 of the disks 11 while the adjacent edges 20 of the collars 20 frictionally contact as shown in Fig. 2. As illustrated in Figs. 2, 3, and 6, the V- shaped projections 21 upon the collars 20 are provided with a cut-away portion 22 extending from the inner edge of the projection to the base 20' of the collar so that a continuous external band is provided for each tumbler.

The outer faces of the tumblers 20 are provided with permutation characters 23 which will indicate to one familiar with the lock structure, the relative positions of the openings 22 in the rotating tumblers with respect to the bolt slot 10 and the disk grooves 1 1. When the rotating tumblers 20 are manipulated to cause the cut-away portions 22 thereof to register with the bolt slot 10 and the disk grooves 14, sliding movemg a collar 20 as shown in Fig. 6 with an ment of the bolt 14 is permitted so that the arm 7 may be moved relative to the shackle 6 to open the lock. lVith the bolt v15 completely received within the screw 9, the rotating tumblers 20 may be rotated to move the cut-away portions 22 out of alinement with the bolt slot 10 and to project V-shaped extension 21 of the tumblers in the space between the bolt projections 17, thus to lock the bolt within the screw 9 and to hold the arm 7 immovable relative to the shackle 6. i

It will therefore be seen that'a thorough knowledge of the lock structure is necessary for successful operations of the look, as the bolt will be maintained immovable as long as the projections upon the tumblers 20 extend between the bolt projections 17.

W hile there is herein shown and described the preferred embodiment of the invention, it is to be understood that various changes in the details of construction are contemplated and it is intended that such changes will fall within the scope of the subject matter claimed.

What is claimed as new is i A permutation lock of the type described comprising a shackle, a tubular screw carried thereby, tumbler supporting members upon said screw, said screw and the tumbler supporting members having registering openings, a bolt slidably received in said tubular screw, projections carried by the bolt extending through the bolt slot, an arm carried by the bolt cooperating with the shackle and rotating tumblers supported on said supporting members and having inwardly directed V-shaped projections extending into the spaces between the projection on said bolts to hold the bolt immovable relative to said screw, the projections on said tumblers having openings therein adapted to be brought into registration with the bolt slot to permit a sliding movement of the bolt with. the projections carried thereby mov- L able through the openings in the tumbler projections.

In testimony whereof I afiix my signature.

ANTONI B. FIDROGKI'. 

